Please help

I need some advice.. i live with my mom currently. Im 21 and im in school. My boyfriend is 25 years old and makes about 15 an hour. Hes worth more than that but its like he refuses to go to his boss for a raise. He also is the lead of the company. I am 22 weeks pregnant. I was sick up until week 18 so i havent gone back to work. I could now and definitely think thats the best idea. I figured id stick it out in school and focus on that. Well i was expecting a student refund of a large sum of money... it ended up being way less than what i thought it was. We moved in here because we were in a huge hole finanicially and i guess it was my mistake that i thought the check would be big enough for a slight boost. We have car issues and need to get the car fixed. Now its nowhere near enough for any of that. Im so stressed and overwhelmed. I have been extremely depressed and suicidal. And i have nobody i can talk to about it. Im not welcome here and its almost impossible to save money because we have to buy food for my siblings too... my mom gets all pilled out and forgets they need to eat too. Its ending up costing us more money because its more mouths to feed. Im in a hole and i cant get out of it. I expected this to be better but now im questioning my ability as a mother. Im so scared. Im going to talk to my ob at my next appt. Oct 2 about my depression. Because all i can think about is putting a bullet through my head. My moms boyfriend (who doesnt even pay bills) makes me feel uncomfortable.. he hates me and has mentioned that several times. Im having flashbacks of being raped and abused by my ex. I have panic attacks. I can barely focus on school and i cant talk to anyone about it because they dont listen. My moms boyfriend makes me feel bad about everything even when i eat. He gets mad because he sees it as taking away from him. I dont even want to eat anymore. Im crying so hard as i write this. I dont know what i need... some advice.. some encouragment... prayers.. i need to be able to leave here so if anyone has any ideas on how to do that please tell me and let me know.